Molding-machine.



F. W. HALL.

MOLDING MKCHINE.

APPLICATION $11, 21) JUNE 22, 1907.

901,932. Patented Oct. 20, 1908.

4 sums-anam- 1.

' amnntoz M ll]- F. W. HALL. MOLDING MACHINE. APPLiCATION FILED JUNE 22,1907.

Patented Oct. 20, 1908,

4 SHEETS-SHEET 2.

avwmdfoz QLW-LK L0. 6 K (M Q @m ru: nouns PETERS canyunma'rcu. n. c.

r; w. HALL; MOLDING MACHINE. APPLICATION FILED J UIEZZ, 1907.

Patented 0ct.20, 1908.

4 SHEETS-SHEET 3.

wwntoz F. W. HALL.

MOLDING MACHINE.

APPLIOATION FILED JUNE 22, 1907.

Patented Oct. 20, 1908.

4 BHBBTB-SHEET 4.

Quota,

UNITED STATES PATENT OFFICE.

FREDERIOK W. HALL, OF MEROIIANTVILLE, NEW JERSEY, ASSIGNOR, BY DIRECTAND MESNE ASSIGNMENTS, TO J. W. PAXSON COMPANY, OF PHILADELPHIA,PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

MOLDING-MACHINE Specification of Letters Patent.

Patented Oct. 20, 1908.

Original application filed December 28, 1906, Serial No. 349,7 62.Divided and this application filed. June 22, 1907.

Serial No. 380,322.

of this specification.

My invention relates generally to apparatus for forming sand molds forthe production of metal castings, and, specifically, to the flaskfittings used in such apparatus, es-

pecially when the latter are employed in a machine containing means forsupporting the flask elements and the pattern-supporting frame and forramming the sand in the flask, around the pattern, to form the mold,

and for vibrating the pattern frame to release it from the sand mold.

This application is a division of my application filed Dec. 28, 1906,Serial No. 349,762, to which reference may be made for description, morein detail, of the pattern-holding frame, and of a preferred newcharacter of such frame, invented by me.

The present invention hereinafter described, is confined to a novelconstruction of the flask fittings, and of novel combining means tounite the same in mechanical coaction, whereby the objects sought by meare accomplished, which are first to distribute the sand-ramming strainby the provision of means to make the pattern-frame more or lessresilient or yielding relatively to the flask elements, under the impactblow; second, to produce a perfect sand-mold without the provision ofany means independent of 4 the flask elements and their fittings, toallow lateral movement of the pattern-frame relatively to the flaskmembers during the rapping of the frame to release the pattern from thesand; and finally to readily and properly assemble and support the frameand the flask members in operative alinement and. to enable the copemember to be guided to proper position relatively to the pattern-framein lifting it on or off the same.

To these ends my invention consists of the elements and combinations ofthem hereinafter described.

Referring to the accompanying drawings, wherein similar letters ofreference are used to indicate corresponding parts in each of theseveral views :Figure 1 is a side elevation of the flask fittings, inposition on the drag and cope; and with the pattern frame between them;Fig. 2 is an end elevation thereof; Fig. 3 is a plan view of the handleof the divided pattern-frame (the latter being partly broken away), thedotted lines showing the fittings on the drag. Fig. 4|: is a detachedplan view and Fig. 1 a like View in elevation, of the guiding pin inplace in the drag fitting; Fig. 5 is an elevation, detached, of theguiding pin for the pattern frame and the cope fitting and holding lugsfor the pattern frame in appropriate relation to each other; Fig. 6 is aplan View,

F ig. 7 a longitudinal vertical section and Fig. 8 an end view of oneend of the patternframe supporting the gate of patterns, and showing thehandle of the frame to which the vibrator is attached, and the recess inthe frame handle to receive the flask frame. Fig. 9 is a side view, Fig.10 a plan, and Fig. 11 an end view of an adjustable fitting 011 thepattern frame, the first two views showing the spring rod by which it ismaintained in appropriate relation to the guiding pin on the drag; Fig.12 is an end elevation, Fig. 13 a plan view and Fig. 14 a sectional sideview, of the cope fitting detached; Fig. 15 is an end view, Fig. 16 aplan view, and Fig. 17 a longitudinal section of the adjustable slidingdevice for the cope fitting,

in which the guiding pin of the drag fitting enters; and Fig; 18 is aplan view and Fig. 19 an end View of a lifting handle for the copefitting employed in lifting the cope from the pattern-frame and drag.

In the drawings (Figs. 1 and 2) there is sufliciently indicated at M thecope and at N the drag of a flask suitable to be operated in a moldingmachine, and between them is a pattern frame A adapted to support a gateof patterns. The cope'M is supplied with a fitting which consists of abracket handle B secured by screws or otherwise to the exterior of theend wall of the cope (see Fig. 12) with outwardly projecting base plateB, which is cut away at B (see Figs. 13 and 14:) to provide a clearancefor the drag fitting and on either side of this opening B are arrangedparallel guide ribs 72 b to receive between them an adjustable plate Bshown in plan view in Fig. 16 and in section and end views in Figs. 17and 15. This adjustable plate B extends through an opening B in thebracket B (see Fig. 12), and is cut away centrally as at B to provide apassageway for the upright guide pin C (see Fig. of the drag fitting.This plate is also slotted at B to enable its more ready adjustment onthe bracket plate B Its opening B is given a rounded rim flange B at theinner end to serve as a guide for the steel pin C of. the drag fitting.A means of more readily lifting the cope from the drag is provided inthe bracket plate B (shown in plan view Fig. 18 and in front view inFig. 19) screwed through the bracket B into the cope wall; its relationthereto being shown in Figs. 1 and 2.

The drag N is supplied with a fitting (see Figs. at and 4 which consistsof a bracket support C screwed to the exterior of the opposite end wallof the drag U and having an outwardly projecting base-plate C on whichisa socketed upright C to support the end of a long upright steel pin C,operating as a guiding pin for the cope. This pin, when the elements areassembled in operative position, passes through the yoke-opening in thehandle of the pattern frame and through the openings in the cope fittingand enables the latter to be guided to proper relative position when itis lifted off or on to the pattern frame. The steel pin C is held in thesock eted base by a pin C The bracket C has upright stop lugs C C (seeFigs. 4 and L which operate to hold the pattern-frame stationary, whenthe parts are assembled; and said bracket C has also, preferably, arearwardly projecting deep flange C which lies over the edge of the dragand provides a metal surface on that part of the drag N over which thepattern-frame is supported. The relation to each other of these severalelements of the drag-fitting is best seen from Fig. 5, and the relationof all of them to the pattern-frame and to the cope fitting is shown inFig. 1.

For the purpose of maintaining the pattern-frame in appropriateoperative alinement with the drag fitting, the yoke-like handle Hopposite the projectionH is recessed at A (see Fig. 6) to receive thespring-supporting and guiding plate A shown in side elevation in Fig. 9and in plan view, Fig. 10. The downwardly projecting flange edge e ofthis plate A (see Fig. 9) supports a thin fiat spring A secured to it atA At each end of this fiat spring is secured an inwardly projectingplate A with a concave end A corresponding in shape to the guiding pin Con the drag-fitting (Fig. 10). The said plate A has a long slottedscrew-hole A to allow room to shift it in the slot A of the yoke handleof the pattern-holding frame and thereby adjust its length of projectioninto the space formed by the yoke-handle and to and from the guidingpin, thereby increasing or lessening, as the case may be, the tension onsaid spring.

The operation of the device will be fully understood from thedescription given; it need only be added that vibration of thepattern-holding frame on its vertically yielding guide pins will produceas well a slight vertical movement of the pattern-frame relatively tothe flask elements and a general tremor throughout both sufiicient toloosen the pattern in the sand and restricted sulficiently to preventinjuring the sand mold; and that, in consequence of the constructiondescribed, the sand-ramming strain is distributed between the patternand the pattern-frame which supports it; and the impact blow is againsta more or less resilient or yielding frame, because it rests to someextent on the sand in the flask, and the natural elasticity of therebound from such a substance is allowed full play by the provision ofthe guide pins on the flask elements loosely fitting the holes in thepattern-frame and permitting vertical movement of the latter relativelyto the flask elements. These lastmentioned features of my inventionaccomplish two wholly novel results, marking de scribed advances in theart, namely, avoidance of the usual strain and consequent breaking ofthe pattern due to the ramming strain; and the production of a perfectsand mold without the provision of any means to provide lateral movementof the patternframe relatively to the flask or its supports during therapping or vibrating of the frame to release the pattern from the sandmold.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent of the United States is:

1. In molding apparatus comprising oppositely-disposed flask elementsand an interposed pattern-frame, of a fitting for the cope member,consisting of a bracket handle having an outwardly-projecting base-platewhich is centrally recessed and provided with a pair of parallelguide-ribs, a fitting for the drag, having a vertically-disposedguidepin, and connecting means operating as an adjustable guide betweensaid elements, consisting of a plate mounted to slide between said guideribs of the cope-fitting and having a central opening for the passage ofthe guide pin ofthe drag fitting.

2. In molding apparatus comprising oppositely-disposed flask elementsand an interposed pattern frame, of a fitting for the drag member of theflask consisting of a bracket support having a basal end projectingoutwardly, a socket on the upper face thereof, a vertically-disposedguide pin mounted in said socket, an inwardly pro jecting flange on thebracket adapted to overlap the edge of the drag member, and verticallugs on the bracket adapted to coincide with the edge of the patternframe to hold it in operative register with the flask elements. a

3. In molding apparatus comprising oppositely-disposed flask elementsand an interposed pattern frame having a yoke-like handle, of adrag-fitting consisting of a bracket support having avertically-disposed guide pin mounted thereon, a cope-fitting consistingof a bracket having horizontal guiding ribs and a recessed plateslidingly mounted thereon between said ribs, the guide pin of the dragpassing through said recess and through the yoke-handle of the patternframe, and means to yieldingly maintain said pattern frame in operativeposition relatively to the flask elements.

4. In molding apparatus comprising oppositely-disposed flask elementsand an interposed pattern frame having a projecting slidingly thereon,said guide pin extending through the recess of said sliding plate andthrough the yoke-handle of the patternframe, with means to maintain saidframe in operative alinement with the drag, consisting of aspring-actuated guiding device mounted midway of its length in thehandle of the pattern frame and bearing resiliently again st theguide-pin of the drag member.

In testimony whereof, I have hereunto affixed my signature this 15th dayof June FREDERICK HALL.

Witnesses:

ADA M. BIDDLE, JAMES STILLMAN.

